The Mutants are the remnants of the Earth Military Coalition, or E.M.C. for short. These mutants were created during the terraforming process, that ended the battle of defiance. The mutants shoot down the stratocarrier the player is riding in, due to a belief that the carrier was invading their planet. Following their last order to protect the planet from the invading alien threat (seeing mutants as humans and humans/votans as aliens). They're all humanoid, so their Crit Spot is the head.

99ers are a group of miners who have undergone extensive cybernetic augmentation to improve productivity in the mines and from which, have developed a belief that a being is not whole unless they become "one" with metal.

Scrappers are artificial lifeforms that were created during the terraforming event and not much is known about how exactly they came into existence. For the most part their Crit Spot is the main front glowing "eye".

Dark Matter is a militant group of Votans who are under the command of Nim Shondu and believe they have been betrayed by both Votans and Humans alike. Seeking to cleanse the planet so that only Dark Matter are in control.

The currently known variety of Dark Matter are:

Enforcer

Sniper

Monitor

Bulwark (bipedal sentry mechs). Crit Spot: The front face of the side missle racks when they are open.